ruinous

Adjective

• causing injury or blight; especially affecting with sudden violence or plague or ruin
  • the blasting effects of the intense cold on the budding fruit
    
  • the blasting force of the wind blowing sharp needles of sleet in our faces
    
  • a ruinous war
    

• extremely harmful; bringing physical or financial ruin
  • a catastrophic depression
    
  • catastrophic illness
    
  • a ruinous course of action
    

Related words

• Synonyms: 
  blasting , catastrophic